An Ethernet physical layer (PHY) transceiver includes a transmitter and a receiver. The transmitter is configured to precode a first data stream by summing two or more mutually-delayed replicas of the first data stream, and to transmit the precoded first data stream over a full-duplex wired channel to a peer Ethernet PHY transceiver. The receiver is configured to receive a second data stream from the peer Ethernet PHY transceiver over the full-duplex wired channel, and to decode the received second data stream while the transmitter concurrently is transmitting the precoded first data stream.
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2. The Ethernet PHY transceiver according to claim 1, wherein the precoder is configured to apply the precoding to the first data stream by (i) delaying the first data stream so as to produce a delayed replica, and (ii) summing the first data stream and the delayed replica.
3. The Ethernet PHY transceiver according to claim 1, wherein the precoder is configured to apply the precoding to the first data stream by (i) delaying the first data stream so as to produce a delayed replica, and (ii) subtracting the delayed replica from the first data stream, or the first data stream from the delayed replica.
This invention relates to Ethernet PHY transceivers, specifically addressing signal integrity and interference mitigation in high-speed data transmission. The technology focuses on improving data transmission quality by reducing inter-symbol interference (ISI) and crosstalk in multi-lane Ethernet systems. The core innovation involves a precoder within the transceiver that processes data streams to minimize distortion before transmission. The precoder operates by applying a precoding technique to a first data stream. This technique involves two key steps: first, the precoder generates a delayed replica of the first data stream. Second, it subtracts this delayed replica from the original first data stream, or vice versa. This subtraction operation effectively cancels out or reduces the impact of ISI and crosstalk, enhancing signal clarity and transmission reliability. The delayed replica is a time-shifted version of the original data stream, allowing the precoder to counteract distortions caused by signal reflections or adjacent lane interference. This approach is particularly useful in high-speed Ethernet applications where signal integrity is critical. By pre-processing the data stream before transmission, the precoder mitigates errors that would otherwise require complex post-transmission correction. The invention improves overall system performance by reducing the need for error recovery mechanisms, thereby increasing data throughput and reducing latency. The precoding method is adaptable to various Ethernet standards and can be integrated into existing transceiver designs with minimal modifications.
4. The Ethernet PHY transceiver according to claim 1, wherein the transmitter is configured to transmit the first data stream at a first data rate, and wherein the receiver is configured to receive the second data stream at a second data rate, higher than the first data rate.
5. The Ethernet PHY transceiver according to claim 1, wherein the receiver is configured to receive and decode the precoded second data stream without concurrently cancelling echoes of the first data stream.
6. The Ethernet PHY transceiver according to claim 1, wherein the transmitter and the receiver are configured to communicate the first data stream and the second data stream between electronic units in a vehicle.
7. The Ethernet PHY transceiver according to claim 1, wherein the transmitter is configured to apply the precoding by summing two or more mutually-delayed replicas of the first data stream.
9. The Ethernet PHY transceiver according to claim 8, wherein the receiver is configured to decode the first data stream by (i) delaying the first data stream by a delay element, so as to produce a delayed replica, (ii) feeding the delayed replica from an output of the delay element back to an input of the delay element, and (iii) subtracting the delayed replica from the first data stream, or the first data stream from the delayed replica.
10. The Ethernet PHY transceiver according to claim 8, wherein the receiver is configured to decode the first data stream by (i) delaying the first data stream by a delay element, so as to produce a delayed replica, (ii) feeding the delayed replica from an output of the delay element back to an input of the delay element, and (iii) summing the delayed replica and the first data stream.
11. The Ethernet PHY transceiver according to claim 8, wherein the receiver is configured to receive the first data stream at a first data rate, and wherein the transmitter is configured to transmit the second data stream at a second data rate, higher than the first data rate.
This invention relates to an Ethernet PHY transceiver designed to handle asymmetric data rates between received and transmitted data streams. The transceiver includes a receiver configured to receive a first data stream at a first data rate and a transmitter configured to transmit a second data stream at a second data rate, where the second data rate is higher than the first. This asymmetry allows for efficient bandwidth utilization in applications where downstream data transmission requires higher speeds than upstream data reception, such as in broadband internet access or video streaming services. The transceiver may also include additional features such as adaptive equalization, error correction, and signal conditioning to ensure reliable data transmission at varying rates. The design optimizes network performance by dynamically adjusting to different data rate requirements without compromising signal integrity or system efficiency. This approach is particularly useful in scenarios where network infrastructure must support both high-speed downstream content delivery and lower-speed upstream communication, such as in cable modems or fiber-to-the-home deployments. The transceiver's ability to handle asymmetric data rates enhances flexibility and scalability in modern Ethernet-based communication systems.
12. The Ethernet PHY transceiver according to claim 8, wherein the receiver is configured to receive and decode the precoded first data stream without concurrently cancelling echoes of the second data stream.
13. The Ethernet PHY transceiver according to claim 8, wherein the transmitter and the receiver are configured to communicate the first data stream and the second data stream between electronic units in a vehicle.
15. The Ethernet PHY communication method according to claim 14, wherein applying the precoding comprises (i) delaying the first data stream so as to produce a delayed replica, and (ii) summing the first data stream and the delayed replica.
16. The Ethernet PHY communication method according to claim 14, wherein applying the precoding comprises (i) delaying the first data stream so as to produce a delayed replica, and (ii) subtracting the delayed replica from the first data stream, or the first data stream from the delayed replica.
17. The Ethernet PHY communication method according to claim 14, wherein transmitting the first data stream comprises transmitting the first data stream at a first data rate, and wherein receiving the second data stream comprises receiving the second data stream at a second data rate, higher than the first data rate.
This invention relates to Ethernet PHY (Physical Layer) communication methods, specifically addressing the challenge of optimizing data transmission rates in asymmetric communication scenarios. The method involves transmitting a first data stream at a first data rate while simultaneously receiving a second data stream at a second, higher data rate. This asymmetric data rate configuration allows for efficient bandwidth utilization in applications where downstream data (e.g., from a server to a client) requires higher throughput than upstream data (e.g., from a client to a server). The method ensures compatibility with existing Ethernet standards while enabling dynamic adjustment of data rates to match varying traffic demands. The technique may be implemented in network interfaces, switches, or other Ethernet-enabled devices to improve performance in scenarios such as video streaming, cloud computing, or IoT communications, where downstream data dominates. The invention enhances network efficiency by reducing unnecessary bandwidth allocation for upstream traffic while maintaining reliable communication.
18. The Ethernet PHY communication method according to claim 14, wherein receiving and decoding the precoded second data stream is performed without concurrently cancelling echoes of the first data stream.
19. The Ethernet PHY communication method according to claim 14, wherein applying the precoding comprises summing two or more mutually-delayed replicas of the first data stream.
21. The Ethernet PHY communication method according to claim 20, wherein decoding the first data stream comprises (i) delaying the first data stream by a delay element, so as to produce a delayed replica, (ii) feeding the delayed replica from an output of the delay element back to an input of the delay element, and (iii) subtracting the delayed replica from the first data stream, or the first data stream from the delayed replica.
22. The Ethernet PHY communication method according to claim 20, wherein decoding the first data stream comprises (i) delaying the first data stream by a delay element, so as to produce a delayed replica, (ii) feeding the delayed replica from an output of the delay element back to an input of the delay element, and (iii) summing the delayed replica and the first data stream.
23. The Ethernet PHY communication method according to claim 20, wherein receiving the first data stream comprises receiving the first data stream at a first data rate, and wherein transmitting the second data stream comprises transmitting the second data stream at a second data rate, higher than the first data rate.
24. The Ethernet PHY communication method according to claim 20, wherein receiving and decoding the precoded first data stream is performed without concurrently cancelling echoes of the second data stream.
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August 27, 2020
October 25, 2022
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